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- W4211232046 abstract "Disruption of neuronal chloride ion (Cl- ) homeostasis has been linked to several pathological conditions, including substance use disorder, yet targeted pharmacotherapies are lacking. In this study, we explored the potential of serotonin 2A receptor (5-HT2A R) agonism to reduce alcohol consumption in male wild-type C57Bl/6J mice and to ameliorate alcohol-induced inhibitory plasticity in the midbrain. We found that administration of the putative 5-HT2A R agonist TCB-2 attenuated alcohol consumption and preference but did not alter water or saccharin consumption. We hypothesized that the selective behavioural effects of TCB-2 on alcohol drinking were due, at least in part, to effects of the agonist on ventral tegmental area (VTA) neurocircuitry. Alcohol consumption impairs Cl- transport in VTA GABA neurons, which acts as a molecular adaptation leading to increased alcohol self-administration. Using ex vivo electrophysiological recordings, we found that exposure to either intermittent volitional alcohol drinking or an acute alcohol injection diminished homeostatic Cl- transport in VTA GABA neurons. Critically, in vivo TCB-2 administration normalized Cl- transport in the VTA after alcohol exposure. Thus, we show a potent effect of alcohol consumption on VTA inhibitory circuitry, in the form of dysregulated Cl- homeostasis that is reversible with agonism of 5-HT2A Rs. Our results provide insight into the potential therapeutic action of 5-HT2A R agonists for alcohol abuse." @default.
- W4211232046 created "2022-02-13" @default.
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- W4211232046 date "2022-02-10" @default.
- W4211232046 modified "2023-10-10" @default.
- W4211232046 title "The serotonin 2A receptor agonist TCB‐2 attenuates heavy alcohol drinking and alcohol‐induced midbrain inhibitory plasticity" @default.
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- W4211232046 doi "https://doi.org/10.1111/adb.13147" @default.
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